Drive-gearing for mining-machines.



J. A. BRANILEY.

DRIVE GEARING FOR MINING MACHINES.`

APPLICATION FILED FEB. 12| I9I8- Patented Mm'. 18,1919.

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TED STATES PATENT OFFICE.

JAMES A. BRANTLEY, OF SAND SPBIN GS, OKLAHOMA.

DRIVE-GEARING-v FOR MININ (T1-MACHINES.

Specification of Letters Patent.

Papented Mar. 18, 1919.

Original application filed February 3, 1917, Serial No. 146,414. Divided and this application led February 12, 1918. Serial No. 216,717.

threaded on the hub 13 and adapted to To all whom t may concern.'

Be it known that I, JAMES A. BRANTLEY, a citizen of the United States, residing at Sand Springs, in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in Drive- Gearing for Mining-Machines, of which the following is a specification.

My present invention pertains to drive gearing designed more especially for use in the mining machine constituting the subject of my contemporary application led February 3, 1917, Serial No. 146,414, of which this application is a division.

The novelty, utility and practical advantages of my improved drive gearing will be fully understood from the following description and claimsy when the same are read in connection with the drawings, accompanying and forming part of this specification, in which:

Figure 1 is a transverse section of a portion of a mining machine embodying my novel gearing.

Fig. 2 is a section taken at right angles to Fig. 1.

Fig. 3 is a detail section of one of the compound gears.

Fig. 4 is a detail section on line 4 4 of Fi 2. p

Similar numerals of reference designate corresponding parts in all of the views of the drawings.

I show in Fig. 1 the shaft 4 of an electric motor which is to be considered as an example of the driving means of my appended claims.

Fixed on the said shaft 4 is a worm 9, and intermeshed with and driven by said worm 9 is a worm wheel 10, fixed on a transverse shaft 11, extending between and journaled in the side walls of a body 1. Mounted to slide on and turn with said shaft 11, at opposite sides of the worm wheel 10 are combined friction and spur gears 12. These gears 12 respectively comprise a soft steel hub 13, Fig. 3, feathered on the shaft 11, a central steel disk 14 loosely though snugly mounted on the hub 13 and having peripheral teeth 15, friction sections 16, of paper or fiber, loosely mounted on the hub 13 at opposite sides of the disk 14 and arranged with their smooth perimeters flush lwith the bottoms of the interdental spaces in the disk 14, and a nut 17 tighten 'the disk 14 and the sections 16 against a flange on the hub. In the outer portions Vof the hubs 13 of the compound gears 12 are circumferential grooves in which are sectional rings 17a having studs 17", disposedy in upright bifurcated levers 18 through the medium of which the compound gears 12 are moved horizontally on the shaft 11.

Each of the gears 12 is arranged back of and opposed tol an inclined steel disk- 20, and each disk 20 is provided in its face with three (more or less) circular series of indentures 21; the indentures of each seriesbeing spaced to receive the teeth 15 of the gears 12. The disks 20 are feathered on forwardly and downwardly inclined shafts 22 which are journaled in bearings 23 in body 1 and are designed to be connected through worms 25 with worm wheels'26 or other means to be driven. One of the said shafts 22 is clearly shown in Fig. 2.

In front of the disks 20 is a transverse shaft 30 on which is fixed an arm 31 to which is connected a rearwardly extending 30 are arms 35, one of which is shown in Fig. 2. Connected with the arms 35, preferably in an adjustable manner, are Vyoke levers 36, one of which is shown in Figs. 2 and 4. Mounted at 37 in the said yoke levers are stpds on sectional rings 38 which studs are disposed in circumferential grooves 39 in steel members 40 loose on the shaft 22 and arranged back of the hubs on the disks 20. Between each of the said members 40 and each of the disk hubs are interposed-a steel race annulus 41 and a steel ring 42 in which are anti-friction balls 43, interposed between the member 40 and the ring 42 and adapted to lessen the friction when the disk 20 is thrust against its complementary gear 12. For the purpose of enabling each lever 36 to pull its respective disk 20 away from the coperating gear 12, links 44 are pivoted to the sides of each lever 36. l The rear portion of said links 44 receive pins on a sectional ring 46 disposed in the circumferential groove 47 of the disk hub.

For the purpose of moving the compound gears 12 relative to the centers of the disks 20 I provide longitudinal rock shafts 54. At their forward ends the shafts 54 are provided with arms 56. These arms are conshafts 22v is reversed ,but the same `variations of speed are available asin the'rst instance. Moreover, it is to benoted thatthe said construction constitutes positive driving connections for the independent operation of the shafts 22 so that one shaft 22 may be rotated lini-one direction and the other Vshaft 22 in the opposite direction; also, that the three series of indentures in eachdisk afford positive driving connections atfthree different speeds in oppositedirections.

I prefer to provide each disk20 With three series of indentures 21 but it is obvious that ythe number Yof the series may be increased or diminished inthe discretion of the manufacturer ofthe gearing Without affecting my Y invention.V p Y Having described my invention, What :I

Yclaim and desire .to secure by Letters Patent, is:

l. The combination With a rotatable shaft; of a compound gear carried by said shaft, said .gear-comprising a hub -feathered upon the shaft, a metallic disk pivoted upon the hub and provided upon its periphery With radially extending teeth, fibrous friction vmembers arranged upon the hub upon opposite sides of the metallic disk and having their peripheries substantially Hush with the periphery of the metallic disk, and

means 4'to bind the friction members to theV sions for coaction With the radial teeth of said gear.

2, The combination With va V.rotatable shaft; ofa compound gearcarried by said shaft,1said gear comprising a vhub feathered upon the shaft,ia metallic diskfpivoted upon the yhub and provided upon its periphery With radially extending teeth, fibrous fric-V tion members arranged .upon the r`hub upon opposite sides of the j-metallicdiskand Shaving their peripheries .substantially flush e With theperiphery of .the-metallic. disk, and

' means to bind the friction members to the metallic disk; mea'nsto shift thegear longitudinally of the shaft; a second -shaft arranged atfsubstantiall-y aright angle to the first named shaft; afdriven disk feathered upon the secondnamed shaft and having a substantially flat face,said face -being provided vvith a 2plurality ofconcentric annular sets of depressions for coaction With the radial teeth of said gear; and meansto shi-ft the driven disk longitudinally of its shaft.

y In ytestimony whereof Iaiix my signature in presence of tWo Witnesses. Y

' .mivrns A. BRANTLEY.

Witnesses:

P. A. SMITH, J. S. NICHOLAS. f

Cop'iesof thispatent maybe obtained for ve cents each,gbry addressnglthe Commissioner of g'atents,

Washington, 1).A C. Y 

